Method and apparatus for measuring volume

Details Method and apparatus for measuring volume Method and apparatus for measuring volume

G - Physics

01

F

33/166

G01F 17/00 (2006.01) G01M 3/32 (2006.01)

Patent

CA 1196495

METHOD AND APPARATUS FOR MEASURING VOLUME Abstract A method and apparatus for measuring the volume of a chamber in a part, such as the combustion chamber (14) of an internal combustion engine cylinder head (10) by, comparing the test chamber with a reference chamber (24) of known vol- ume, wherein the reference chamber is exposed to the part (10) containing the test chamber so that ambient variables are minimized, and accurately controlled quantities of a gas are injected into each chamber and the difference in pres- sures in the chambers read as a function of test chamber vol- ume, and thereafter the rate of change of pressure differ- ences in the chambers is read as a function of chamber leak- age and the volume measurement discarded if the rate of change exceeds a determined value.

417109

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